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<head><meta charset="utf-8"><title>PR 87349 · t-compiler/help · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/182449-t-compiler/help/index.html">t-compiler/help</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/182449-t-compiler/help/topic/PR.2087349.html">PR 87349</a></h3>

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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/182449-t-compiler/help/topic/PR%2087349/near/247179662" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Alik Aslanyan <a href="https://rust-lang.github.io/zulip_archive/stream/182449-t-compiler/help/topic/PR.2087349.html#247179662">(Jul 26 2021 at 09:22)</a>:</h4>
<p>Hi! I had a perf regression in my PR: <a href="https://github.com/rust-lang/rust/pull/87349">https://github.com/rust-lang/rust/pull/87349</a><br>
I tried to make computations inside <code>visible_parent_map</code> lazy.<br>
On my PC <code>await-tree-call</code> example is compiling now in 42-48ms in nightly and just<br>
1-8ms more for stage1 version.</p>
<p>Can you please redo @rust-timer run and provide some guidance how to optimize this more?</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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